Andy Murray faces Kei Nishikori in his second ATP World Tour Finals match at the O2 Arena in London on Wednesday afternoon. The pair are joint-top of the John McEnroe group after making near-perfect starts to the tournament on Monday.Nishikori comprehensively outplayed Stan Wawrinka in a 6-2 6-3 triumph, while Murray brushed aside Marin Cilic in a similarly emphatic 6-3 6-2 victory. Live Tennis: ATP World Tour Finals November 16, 2016, 12:00pm Live on Get Sky Sports Get a Sky Sports pass Murray goes into the game looking for his 21st victory in a row, while Nishikori is battling for rankings points in his bid to end the year as world No 3.Murray has won seven of the pairs nine meetings to date, although Nishikori prevailed in five sets in their last match, in Septembers US Open quarter-final. John McEnroe Group Won-Lost Sets Games Kei Nishikori 1-0 2-0 12-5 Andy Murray 1-0 2-0 12-5 Stan Wawrinka 0-1 0-2 5-12 Marin Cilic 0-1 0-2 5-12 Murray struggled to gauge the speed of the ball in the opening games of his win over Cilic on Monday, but he found his range later in the match and should now be fully acclimatised to the court.Nishikori had no such trouble against Wawrinka and appears perfectly suited to the O2.Murray said of Nishikori: I would say this is probably his best year that he has had on the tour. He is one of the best players in the world. He has been playing very well the last few months especially.Murray and Nishikori will be on court after 2pm. Fleming/McEnroe Group Won-Lost Sets Games R Klaasen/R Ram 1-0 2-0 13-9 H Kontinen/J Peers 1-0 2-0 13-9 P Herbert/N Mahut 0-1 0-2 9-13 F Lopez/M Lopez 0-1 0-2 9-13 The first match of Wednesdays afternoon session sees Henri Kontinen and John Peers take on Raven Klaasen and Rajeev Ram in the Fleming/McEnroe Group of the doubles competition.Both pairs won their opening matches of the tournament in straight sets.They have faced each other twice before, with Kontinen and Peers winning both times.Watch every day of the ATP World Tour Finals, from November 13-20, live on Sky Sports. Full schedule here. Six months half price Upgrade to Sky Sports to watch Man Utd v Arsenal on Saturday and get the first six months half price Also See: Thiem beats Monfils in London Murrays service syndrome over? Murray wins on debut as No 1 We will get the dream final Jerome Baker Youth Jersey . -- The Bishops Gaiters are showing they belong among the countrys top varsity football teams. Ryan Fitzpatrick Womens Jersey . Thousands of fans at Mosaic Stadium will be cozying up to each other in an effort to stay warm in chilly temperatures and block the Prairie wind that locals say can knock your socks off. http://www.authenticdolphinspro.com/Minkah-fitzpatrick-dolphins-jersey/ . The veteran safety was a starter for the Bengals from 2008-2012. He totaled 41 tackles and three interceptions while starting all but four of the 13 games he played last season. Mike Gesicki Jersey . Batiste, who briefly signed with the Eskimos in 2006, has spent time with several NFL teams including the Pittsburgh Steelers and Washington Redskins. Durham Smythe Dolphins Jersey . -- Aaron Murray threw for 408 yards and three touchdowns, ran for another score, and led No.Michael Carrick has to start if Manchester United are to beat Arsenal this weekend, according to Ray Wilkins. The former United star says defeat in Saturdays live Sky Sports game - even this early in the season - would end his old clubs hopes of a top-four Premier League finish.Wilkins believes starting veteran midfielder Carrick represents Jose Mourinhos best chance of continuing an impressive head-to-head record against Arsene Wenger. Man Utd vs Arsenal November 19, 2016, 11:30am Live on Get Sky Sports Get a Sky Sports pass Watch NOW TV Watch Sky Sports for just £6.99. No contract. Wengers sole success against Mourinho came in last seasons Community Shield, but victory at Old Trafford would give Arsenal a nine-point lead over United with almost a third of the season played.Speaking on Sky Sports News HQ, Wilkins said: Manchester United cannot afford to let Arsenal win at the weekend. Arsenal will bounce clear, and you cant be giving teams three-game swings at his stage of the season.For United to finish in the top ffour theyve got to beat Arsenal on Saturday, and its going to be tough.ddddddddddddMourinho is without suspended Zlatan Ibrahimovic for the game and has problems in defence with Eric Bailly and Chris Smalling injured. Manchester United will be without Zlatan Ibrahimovic when they take on Arsenal But the key area, Wilkins says, is in midfield where Carrick was recalled for the 3-1 defeat of Swansea that preceded the international break and gave United a first league win in five games.Manchester United have won on each of the 35-year-olds four starts this season, and Wilkins said: I dont think United have controlled many games. Manchester Uniteds Paul Pogba volleys home the opening goal against Swansea I think with Carrick in the side thats the only option they have to get some semblance of control and a bit of serenity.He sees the game so well, he can hit long passes and if United are going to push up and attack Arsenal youre going to need that guy, with all his knowledge, to stop counter-attacks.I think Michael will have to play for United to have a good chance. Also See: Kane perfect for United Life good under Jose Wenger vs Mourinho Depay wont rule out exit ' ' '